You always need to provide more details for anyone to help you.
Writing threads with just the sibject won't do any good :)
Read this before you post https://forums.oracle.com/forums/ann.jspa?annID=56
Btw , see if this is what you need - http://learn-adf.blogspot.com/2012/05/adf-open-pdf-file-in-new-window-or-in.html
We are actually migrating the ADF 10g application to 11g using Jdeveloper 11g(188.8.131.52) and in the existing 10g the same code is used and it's working and also in 11g when i use the same code it works fine when I change the the target to self from blank.
Currently we are using trinidad components.
But the requirement is to open the content in the new pop window and not on the same window.